Neighbor table entry processing method and device

A processing method and technology of neighbor table, applied in the field of communication, can solve the problems of equipment interruption, aggravating the impact of network attacks, and unable to process NA response packets in time, so as to reduce equipment interruption and reduce the impact of network attacks.

Active Publication Date: 2018-01-05
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on the above situation, when there are a large number of ND attack packets (attack packets include NS packets, NA response packets, etc.) Only packets can detect network attacks. At this time, if there are neighbor entries in the Probe state in the device, it will be impossible to process NA response packets in time to a large extent, and the neighbor entries will be deleted, causing the device to disconnect and aggravate the situation. impact of cyber attacks

Method used

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  • Neighbor table entry processing method and device

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Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] Currently, in the ND technology, the state information of the neighbor included in the neighbor entry includes:

[0035] Incomplete (incomplete) state: Indicates that the address is being resolved, but the neighbor link layer address has not yet been determined;

[0036] Reachable state: indicates that the address resolution is successful and the neighbor is reachable;

[0037] Stale state: Indicates that the reachable time is exhausted, and it is not ...

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Abstract

The embodiment of the invention provides a neighbor table entry processing method and device. The method comprises the following steps: when network attack is detected, if a limiting table entry is not issued ad first neighbor test corresponding to a first neighbor table entry in a Probe state is accomplished, determining a first NA answer message for the detection sent by a first neighbor is received; and if the first NA answer message is not received, updating the state of the first neighbor table entry as a Departed state, wherein the Departed state is used for indicating that the neighbortable entry is discharged but it has a forwarding function. By application of the neighbor table entry processing method and device in the embodiment of the invention, in the case of the network attack, the device breakdown can be reduced, and the impact of network attack is relieved.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to a method and device for processing neighbor entries. Background technique [0002] In ND (Neighbor Discovery, Neighbor Discovery) technology, based on IPv6, after each device learns each other's MAC (Media Access Control, Media Access Control) addresses, it generates and stores neighbor entries, which include: Link layer address (MAC address), neighbor status information (for example: reachable (Reachable) status, failure (Stale) status, delay (Delay) status, detection (Probe) status, etc.), the status of neighbor entries at this time It is Reachable state. When a packet triggers a neighbor entry, the packet can be sent according to the neighbor entry; if no packet that can trigger the neighbor entry is received within a period of time, the state of the neighbor entry is set to the Stale state; when there is When a packet triggers a neighbor entry in the Stale st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L12/751H04L12/26H04L12/24H04L45/02
Inventor 罗琳
Owner NEW H3C TECH CO LTD
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